Valve structure



Julie 1953 F. H. MUELLER ErAL 2,642,257

VALVE STRUCTURE Filed Aug. 19. 1949 v 2 Sheets-Sheet 1 INVENTORS.

Fr pank J-[. Maellen' M IR N/ BY (Z QMM @QHI Z ATTORNEY June 16, HMUElrLER. 7 2,642,257

VALVE STRUCTURE;

' 2 Shets-Sheet 2 Filed Aug. 19. 1949 ATTORNEYS Patented June 16, 1953OFFICE snw rycii Frank H. Mueller and Walter :l. Bowan,

Decatur,

Ill., assignors' to MueIIer 430,, -Decatur,--Ill.', a ecornorationofIllinois Y l p cationiklislisiltt 1949, seamelit-1.88

rel-aim. (o1. 251?1;12)

The present invention relates to valve-structures.

Objects of the invention-are-to provide a'valve which-can be produced at'low' cost and -is-of optimum simplicity and efficiency;- otherob'jectsand advantages of the invention will be apparent from the followingspecification and accom'panya mg drawings wherein Figure 1 is an axialsection through the valve structure;

Figure 2- is en elevation ure from the right;

Figure 3 is anaxial section on Fi ure Figure 1 is a plan elevation ofthe Figure .1

looking toward Figstructure but-with the abutment or cap of that end oftheseat to the exterior of the casing. Flow-passages ['3 and 14 open tothe seatingsunface ll, these passages being in alignment radially ofseat H and "lyingnormal'to the axis of the seat .The larger end'.;of=iseat II is closed,

by a threaded .closureli. 1A :seal may Dneprovided between the. .cap:and' the .rcasingptllii by means of a packing ring IS.

The plug I8 is of tapered form but includes a cylindrical portion I 9projecting from its smaller end and to the exterior of casing [0. Plug I8 includes a how passage 20. The plug is urged to seated position bymeans of a spring 2| fitted in a recess 22 in the closure I5, the innerend of intthe linea es era.

the spring bearin upon an annular washer 23.

Washer 23 bears upon diametrically opposite shoulders 24 formed in thelarger end of the plug. It will be observed that the shoulders 24 do notclose the larger end of the plug and a chamber open to fluid pressure,and in which the spring 2| is positioned, is thereby provided within theplug and in the larger end of the casing.

As is best shown in Figures 5 and 6, the seat I l of casing I0 isprovided with two diametrically opposite recesses 25 respectivelypositioned intermediate the mouths of the flow passages 13 and plug withh l4. These recesses are oi the same outline as the mouths of theflowpassages of the casing and the plug. Plug l8 isalso provided with twodia metrically aligned recesses designated 26 having the same outline asthe how passages and posi tioned intermediate the mouths of the plugflow V passage 20. As is best shown in Figures 5 and 6,

the recesses 26' in the plug are' substantially deeper in a directionradiallyof the valve axis than the recesses 25 in the casing. Byfthisarrangement, the casingWaLlwiH 'not be unduly weakened by its recesses,This is an important factor because the casing of avalyefof this type isua l formed cast irqe .By m kin th recesses 2 i ill- 91 8 m r subst ntal di p 'hr h b a s r nze us the P us ca b a e n Space .pm vdg o an .3 155 491 3 o rease.- i I The valve structure 9: the present in nti n rimarly in ame 'eutline as the of these as a es,

t e p esence of grease in the rec sses 2. w pr c u e gas-item a t n uponthe me al o h p uszinp ose-d posi on uc gas th plugpassa e .20 wil ibprevented from surface by the grease in the recesses 25 with whichpassage 20 is aligned.

By the arrangement just describedas well as because of the manner inwhich lubricant will be wiped upon the seating surface as hereinafterdescribed, the gas cannot reach any portion of the seating surface ofeither the casing or plug when the plug is open or in closed position.

With regard to the lubricating and sealing effect of the grease in therecesses 25 and'26, it will be noted by reference to Figure 5 that whenthe plug is in open position and is then turned to closed position bycounterclockwise rotation,

the grease in the plug recesses 26 will be wiped upon the seat ll of thecasing. At the same time, the portion of the plug which moves past ndeda curb or line stop in J e. in o trol he the fl w .Q as unde high 2 pessur hasa corros ve a tion va re n he kept lub 'cated against seizure Itits ines the casing s atin The cylindrical portion or shank H3 at thesmaller end of the plug carries an abutment member 30 which also servesas a cap for the plug. The cap 30 includes a flattened portion 31 whichprovides a handle upon which a tool can be fitted.

The inner portion of cap 39 is recessed as indi-.

cated at 32 to closely fit the cylindrical end portion 19 of the plug.Outwardly of recess 32 the abutment member or cap 30 includes acircumferential skirt 33 which projects axially toward the casing. Thefree end of skirt 33 is spaced a slight distance from a flat surface 34on the casing when the plug is in seated position. If the plug becomesseized by reason of remaining in one position for a long period of time,it can be freed by tapping the cap 30 to thereby slightly unseat it.However, this unseating movement will be limited by the contact of theinner edge of the skirt 33 with the surface 34. In other words, the plugcannot be unseated to such an extent that fluid pressure can build upbetween the seating surfaces to prevent reseating by spring 2 i. It willbe observed that the recesses and 28 have their axial ends lying in thesame transverse planes as the corresponding ends of the mouths of thepassages, and these ends are spaced a substantial distance from thechamber in which spring 2| is positioned. Hence, it will not b possibleto unseat the plug to such an extent that pressure moving from thespring chamber can reach the recesses to thereby prevent reseating ofthe plug.

As best shown in Figure '7, the abutment member or cap is provided withdiametrically opposite lugs 38 and 39 which extend radially in- Wardlyfrom the skirt 33 to such an extent that they will be closely adjacentthe cylindrical por tion l9 of the plug. These lugs and the skirt areapertured to receive a steel pin 40 which extends diametrically of theplug and to each outer periphery of the skirt 33. Alternatively, theaperture of one lug could be closed at its outer end as shown in Figure8 and a shorter pin 4| used.

The lugs 38 are arranged to engage Stops 42 which project upwardly fromcasing ID within skirt 33, such engagement limiting rotation of plug [8between open and closed positions.

It will be noted from Figure 3 that the pin 40 or 4| extends through asolid and relatively heavy portion or plug l8. This arrangement, plusthe fact that the lugs 38 closely embrace the plug, insures that the pinwill not-be broken by any unseating blow upon the abutment or cap 30.Also, the fact that the pin is made of steel causes it' to reinforce theabutment 30, which is cast of iron. In fact, because of thisreinforcement, the lugs 42 need not be of great thickness. Theterminology used in the specification is for the purpose of descriptionand not of limitation,

the scope of the invention being indicated in the claim.

having a peripheral skirt depending into spaced adjacency with theopposed end of said casing to limit unseating movement of said plug; apair of diametrically disposed lugs depending from said memberradially-inwardly of said skirt; at

least one corresponding upstanding lug-on said opposed casing endengageable by said member lugs to limit rotation of said plug; and a pinextending diametrically through one side of said skirt, through one ofsaid member lugs, through said shank, and at least partially into theother of said lugs to secure said member to said shank,

FRANK H. MUELLER. WALTER J. BOWAN.

References Cited in the file of this patent UNITED'STATES PATENTS

